I'm using a Vaio VGN-B3XP, and I get a Generic Backlight Device in hal- device-manager which comes up as laptop_panel and with the /sys/ directory Pedro mentioned. I can see and chat with /sys/class/backlight/sony/brightness, and pushing values into it affects my brightness. The sony_laptop and sonypi modules were loaded automatically on my system.
I also get this problem too. Hotkeys work fine; trying to configure the laptop to dim from the power preferences doesn't work at all. I'm using stock Gutsy with ENABLE_LAPTOP_MODE=true in /etc/default/acpi-support . My fix is to get laptop-mode to do the dirty work: # In /etc/laptop-mode/laptop-mode.conf CONTROL_BRIGHTNESS=1 BATT_BRIGHTNESS_COMMAND="echo 4" LM_AC_BRIGHTNESS_COMMAND="echo 7" NOLM_AC_BRIGHTNESS_COMMAND="echo 7" BRIGHTNESS_OUTPUT="/sys/class/backlight/sony/brightness" Pretty ugly, and it's likely to get messy when a proper fix is released and g-p-m/hal can manage it once again. Values range from 1 to 7 for my laptop. YMMV. Under edgy and fiesty, the same problem occurred, and was due to bashisms in a hal script. See bug 65028. The workarounds for that don't work any more, naturally. -- [regression] gnome-power-manager laptop backlight not working on VAIO VGN-FSxxx https://bugs.launchpad.net/bugs/152731 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
